There are 4 accounts
The desired distribution of the invested BTC:
17.5% in Account 1
22.5% in Account 2
27.5% in Account 3
32.5% in Account 4
The average bonus of the 4 accounts is 18.25%
So I can pay off all revenue from Account 1 as dividend.
That means a payoutquote of 17.5% and a reinvestment quote of 82.5%
Be careful, as these numbers, and their average, will change as more money is put in and as money is reinvested. Using all of account one's payouts would eventually deplete the total investment (as it's shown on your website you previously linked to).
I would figure you'd want to maintain a constant total investment across all accounts and payout anything above that to keep the shares from either inflating (if the total in the fund increases with time, each share will derive dividends from more than the par value invested in pyramining) or deflating (if you don't keep enough invested with pyramining).
Also, your stated average bonus means fairly little since the current investment into each account does not match what you intend to put in there once you have more investments.
Investors should also be aware that this essentially comes out to a mining share (pyramining is a mining company that takes deposits and pays them back with interest). While pyramining intends to move to ASICs, they are working on developing their own so may be behind other ASIC producers.